Please help!
1. How many valence electrons are in the outermost energy level of each of the following elements?
a. Helium
b. Lithium
c. Nitrogen
d. Magnesium
I listed them as letters to make it easier to understand...

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Please help!
1. How many valence electrons are in the outermost energy level of each of the following elements?
a. Helium
b. Lithium
c. Nitrogen
d. Magnesium
I listed them as letters to make it easier to understand...

Physics

Stacey Warren - Expert brainly.com

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Well done!
Now we know that electronic configurations for the given elements are as following
a. Helium = 2
b. Lithium = 2, 1
c. Nitrogen = 2,5
d. Magnesium = 2,8,2
How to calculate valence electron now???
The last number in each of them represents the valence electrons. So for nitrogen, number of valence electrons will be 2.

anonymous

2 years ago

huh?

Abhisar

2 years ago

Can you tell me the number of valence electrons for the rest?

anonymous

2 years ago

if it's the last number, wait what is that referring to ?

anonymous

2 years ago

what placement is it referring to?

Abhisar

2 years ago

I am not able to understand ur question..

anonymous

2 years ago

what do you mean by "The last number in each of them represents the valence electrons."
^^^^^^^^^^^^

Abhisar

2 years ago

|dw:1434048894292:dw|

anonymous

2 years ago

yes but you said that 2 was nitrogen's number, but wouldnt it be 5?

Abhisar

2 years ago

When did I say that?
Yes, nitrogen has 5 valence electrons.

anonymous

2 years ago

XD "The last number in each of them represents the valence electrons. So for nitrogen, number of valence electrons will be 2."

Abhisar

2 years ago

Last is 5 :(
See, what we wrote for Nitrogen. (2, 5). 2 is first and 5 is last. Getting it?

\(\color{blue}{\text{Originally Posted by}}\) @Abhisar
Well done!
Now we know that electronic configurations for the given elements are as following
a. Helium = 2
b. Lithium = 2, 1
c. Nitrogen = 2,5
d. Magnesium = 2,8,2
How to calculate valence electron now???
The last number in each of them represents the valence electrons. So for nitrogen, number of valence electrons will be 5.
\(\color{blue}{\text{End of Quote}}\)